回複：入境當然要中國護照。即使不出境也應該持有有效護照

Read this  U.S. Customs and Border Protection website:

https://help.cbp.gov/app/answers/detail/a_id/1191/~/traveling-outside-of-the-u.s.---documents-needed-for-lawful-permanent-residents

"What documents, identification, and paperwork does a legal permanent resident (LPR) or Green Card holder need to travel internationally?

Lawful Permanent Residents (Green Card holders) do not need a passport to enter the United States, however, they may need a passport to enter another country. Please contact the embassy of the foreign country you will be traveling to for their requirements. Note: Canada does not require a passport from U.S. LPR's. "